3281820 has 48 divisors (see below), whose sum is σ = 9313920. Its totient is φ = 863296.

The previous prime is 3281791. The next prime is 3281821. The reversal of 3281820 is 281823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3281821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4651 + ... + 5309.

It is an arithmetic number, because the mean of its divisors is an integer number (194040).

Almost surely, 2^3281820 is an apocalyptic number.

3281820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3281820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4656960).

3281820 is an abundant number, since it is smaller than the sum of its proper divisors (6032100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3281820 is a wasteful number, since it uses less digits than its factorization.

3281820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754 (or 752 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 3281820 is about 1811.5794213890. The cubic root of 3281820 is about 148.6066528555.

The spelling of 3281820 in words is "three million, two hundred eighty-one thousand, eight hundred twenty".